Improvement Of The Seismic Retrofit
Performance Of Damaged Reinforcement
Concrete Piers Using A Fiber Steel
Composite Plate
Author(s)
K.-B. Han, P.-Y. Song, H.-S. Yang, J.-H. Lee, J.-M. Kang
& H.-J. Kim
Abstract
An experimental study was conducted to verify the application and efficiency of
the jacket retrofit method to ensure seismic performance of damaged
reinforcement concrete (RC) bridge piers. A total of 4 RC bridge piers were
made and then 3 piers were pre-loaded under the range of service load to be
damaged. These piers were retrofitted and repaired using a carbon fiber
reinforced polymer (CFRP), steel plate, and fiber steel composite (FSC) plates.
These retrofitted and repaired piers were subjected to repeated monotonic
loading. Hysteresis and ultimate behaviours of the 3 RC piers were evaluated and
compared with those of 1 non-damaged pier (standard specimen). As a test
result, the retrofitted and repaired RC bridge piers applied by the jacket retrofit
method were ensured under the targeted displacement ductility and ultimate load.
The ultimate load and displacement ductility of the pier retrofitted and repaired
by FSC plate were higher than those of other piers by CFRP and steel plates and
also the pier by FSC plate showed better energy dissipation capacity than others.
Generally, RC bridge pier retrofitted and repaired with the jacket retrofit method
has low ductility but it was found that the pier retrofitted and repaired by FSC
plate combined with CFRP and steel wire had overcome effectively this
disadvantage through ductility evaluation based on the concept of energy
numerically. This experiment showed that one could improve the safety margin
and targeted ductility by repairing the cracks, spalls, etc. of the damaged RC
Keywords
seismic performance, damaged RC piers, FRP plate, steel plate, FSC plate, ductility, concept of energy
Related Book
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